Fujitsu AOU30RLXEH, Service Instruction

Page: 71 / 120

OK
OK
OK
OK
1. 3-way valve not opened 2. EEV defective, strainer clogged
3. Outdoor unit operation failure, foreign matter on heat exchanger
4. Compressor temperature thermistor failure 5. Insufficient refrigerant
Compressor temperature thermistor characteristics check
(Check by disconnecting thermistor from PCB)
*
For the characteristics of the thermistor, refer to the Trouble shooting 19.
Test 4 : Check the compressor temperature thermistor
Test 3 : Outdoor unit fan, heat exchanger check
Check for foreign object at heat exchanger
Check if fan can be rotated by hand.
Motor check
(SERVICE PARTS INFORMATION 5)
Test 5 : Check the refrigerant amount
Leak check
<Cooling operation>
OK
<Heating operation>
Test 1 : Check if 3-way valve(gas side) is open.
EEV open?
Strainer clogging check (before and after EEV, ACM
oil return)
Test 2 : Check the EEV, strainer
EEV open?
Strainer clogging check (before and after EEV, ACM
oil return)
Test 2 : Check the EEV, strainer
If the 3-way valve(gas side) was closed, open the
3-way valve(gas side) and check operation.
Test 1 : Check if 3-way valve(liquid side) is open.
If the 3-way valve(liquid side) was closed, open the
3-way valve(liquid side) and check operation.
OK
Trouble shooting 32
OUTDOOR UNIT Error Method:
Compressor Temp. Error
Compressor temperature thermister
Protection stop by “compressor temperature” > 230 °F (110 °C) during compressor
operation”” generated 2 times within 24 hours.
Detective Actuators: Detective details:
Indicate of Display:
Forecast of Cause:
Outdoor unit :
POWER
MODE
ERROR
2
0 1
(L1) (L2) (L6) (L5) (L4) (L3)
3
PUMP
DOWN
LOW
NOISE
PEAK
CUT
(SERVICE PARTS INFORMATION 3) (SERVICE PARTS INFORMATION 3)
02-35
Indoor Unit :
Operation lamp: 10 times Flash,
Timer lamp : 3 times Flash
ERROR CODE : [E : A3 ]
n: n times blinking : Light ON : Light OFF